Desc: Secret Service: Directed by J. Walter Ruben. With Richard Dix, William Post Jr., Shirley Grey, Nance O'Neil. Lewis Dumont, a Northern officer in the American Civil War, works undercover behind Confederate lines in an attempt to lead Southern forces away from an area in which a Northern attack is planned. But Dumont falls in love with a Southern girl and when she proves useful to his plan, his conscience begins to tear at him.